Integrating Reliability of Passive Residual Heat Removal System for AP1000 into Probabilistic Safety Assessment
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摘要: 研究AP1000非能动余热排出系统可靠性,应用重要度和敏感性指标全面详细地分析系统设备可靠性,得到导致系统失效的设备各种失效模式的重要度和敏感性排序结果;整合了系统设备可靠性与物理过程可靠性,将整体可靠性融合进概率安全评价模型。分析结果表明:研究非能动余热排出系统可靠性时不仅需要分析其设备可靠性,还应该重点考虑系统物理过程可靠性,应整合两种可靠性并将系统整体可靠性融合进概率安全评价模型,综合分析非能动余热排出系统可靠性。Abstract: The paper studied the reliability of AP1000 passive residual heat removal system, and various importance and sensibility index were used to analyze the hardware reliability of the system. Importance and sensibility order for various failure mode of equipment leading to system failure is obtained to provide references to optimize the system and improve the hardware reliability. The hardware and physical process reliability of the system is integrated into the probabilistic safety assessment. The result was found that the evaluation of the reliability of the passive residual heat removal system not only analyzed the hardware reliability but also considered the physical process reliability, and the hardware and physical process reliability should be integrated into the probabilistic safety assessment to evaluate the passive residual heat removal system reliability comprehensively.
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